HTML DOM - How To

Change an HTML Element

HTML elements can be changed using JavaScript, the HTML DOM and events. HTML DOM and JavaScript can change the inner content and attributes of HTML elements. The following example changes the background color of the <body> element:

How To Change an HTML Element Example

<html>
<body>

<script type="text/javascript">
document.body.bgColor="lavender";
</script>

</body>
</html>

Change the Text of an HTML Element - innerHTML

The easiest way to get or modify the content of an element is by using the innerHTML property. The following example changes the text of a <p> element:

Change the Text of an HTML Element using innerHTML Example

<html>
<body>

<p id="p1">Hello World!</p>

<script type="text/javascript">
document.getElementById("p1").innerHTML="New text!";
</script>

</body>
</html>

Change an HTML Element Using Events

An event handler allows you to execute code when an event occurs. Events are generated by the browser when the user clicks an element, when the page loads, when a form is submitted, etc.

The following example changes the background color of the element when a button is clicked:

Change an HTML Element Using Events Example

<html>
<body>

<input type="button" onclick="document.body.bgColor='lavender';"
value="Change background color" />

</body>
</html>

Change the Text of an Element - with a Function

The following example uses a function to change the text of the <p> element when a button is clicked:

Change the Text of an Element With a Function Example

<html>
<head>
<script type="text/javascript">
function ChangeText()
{
document.getElementById("p1").innerHTML="New text!";
}
</script>
</head>

<body>
<p id="p1">Hello world!</p>
<input type="button" onclick="ChangeText()" value="Change text" />
</body>
</html>

Tampilan Bagaimana Merubah Teks pada Sebuah Elemen Menggunakan Fungsi

Text changed here!

Using the Style Object

The Style object of each HTML element represents its individual style. The following example uses a function to change the style of the <body> element when a button is clicked:

Using the Style Object Example

<html>
<head>
<script type="text/javascript">
function ChangeBackground()
{
document.body.style.backgroundColor="lavender";
}
</script>
</head>

<body>
<input type="button" onclick="ChangeBackground()"
value="Change background color" />
</body>
</html>

Hot To Using the Style Object Display

Change the font and color of an Element

The following example uses a function to change the style of the <p> element when a button is clicked:

How To Change the Font and Color of an Element Example

<html>
<head>
<script type="text/javascript">
function ChangeStyle()
{
document.getElementById("p1").style.color="blue";
document.getElementById("p1").style.fontFamily="Arial";
document.getElementById("p1").style.fontSize="larger";
}
</script>
</head>

<body>
<p id="p1">Welcome Leakbali.com Visitors!</p>
<input type="button" onclick="ChangeStyle()" value="Change style" />
</body>
</html>

How To Change the Font and Color of an Element Display

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References

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